Why Bruce Lee’s one-inch punch was so effective.

The one-inch punch is a punching exercise from Chinese martial arts performed at a range of 0–15 cm (0–6 in). The one-inch punch was popularised by actor and martial artist Bruce Lee. It is designed to improve punching power and technique.

The One-inch punch is present in many styles of Southern Chinese martial arts. As a general rule, Southern Chinese martial arts rely mostly on hand techniques from very close quarters (as opposed to Northern Chinese martial arts which focus more on kicking techniques from medium to long distances).

Because the Southern styles martial artists were often fighting nose-to-nose with their opponents, they had to learn a way to deal out punishing blows even while almost touching their target.

No feat of martial arts is more impressive than Bruce Lee’s famous strike, the one-inch punch. From a single inch away, Lee was able to muster an explosive blow that could knock opponents clean off the ground. Lee mastered it, fans worldwide adored it, and Kill Bill “borrowed” it. But if you’re like us, you want to know how it works.

Here’s a short documentary on the One Inch Punch. Interviews with Jeet Kune Do and Wing Chun instructors. Discover more on what Bruce Lee demonstrated years ago. Shot and edited
by Victor Tran.

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While the biomechanics behind the powerful blow certainly aren’t trivial, the punch owes far more to brain structure than to raw strength.

To understand why the one-inch punch is more about mind than muscle, you first have to understand how Bruce Lee delivers the blow. Although Lee’s fist travels a tiny distance in mere milliseconds, the punch is an intricate full-body movement.

“When watching the one-inch punch, you can see that his leading and trailing legs straighten with a rapid, explosive knee extension,” Rose says. The sudden jerk of his legs increases the twisting speed of Lee’s hips—which, in turn, lurches the shoulder of his thrusting arm forward. [sources : wiki, popularmechanics.com]